<template>
    <div>
         <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item>商品管理</el-breadcrumb-item>
    <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
        <!-- 警告区域 -->
        <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon :closable="false">
        </el-alert>
        <!-- 步骤条区域 -->
        <el-steps :space="200" :active="activeIndex -0" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
        </el-steps>
    <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
    <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTableLeave"
    @tab-click="tabClicked">
    <el-tab-pane label="基本信息" name="0">
        <el-form-item label="商品名称" prop="goods_name">
            <el-input v-model="addForm.goods_name"></el-input>
        </el-form-item>
        <el-form-item label="商品价格" prop="goods_price">
            <el-input v-model="addForm.goods_price" type="number"></el-input>
        </el-form-item>
        <el-form-item label="商品重量" prop="goods_weight">
            <el-input v-model="addForm.goods_weight" type="number"></el-input>
        </el-form-item>
        <el-form-item label="商品数量" prop="goods_number">
            <el-input v-model="addForm.goods_number" type="number"></el-input>
        </el-form-item>
        <el-form-item label="商品分类" prop="goods_cat">
            <el-cascader
            v-model="addForm.goods_cat"
            :options="catelist"
            :props="cateProps"
            @change="handleChange"></el-cascader>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品参数" name="1">
        <!-- 渲染表单的item项 -->
        <el-form-item v-for="item in manyTableData" :key="item.attr_id" :label="item.attr_name">
        <el-checkbox-group v-model="item.attr_vals">
        <el-checkbox :label="cb" v-for="(cb,i) in item.attr_vals" :key="i" border></el-checkbox>
        </el-checkbox-group>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品属性" name="2">
        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
            <el-input v-model="item.attr_vals"></el-input>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品图片" name="3">
        <!-- action表示图片要上上传到的api地址 -->
        <el-upload
        action="https://lianghj.top:8888/api/private/v1/upload"
        :on-preview="handlePreview"
        :on-remove="handleRemove"
         list-type="picture"
         :headers="headerObj"
         :on-success="handleSuccess">
  <el-button size="small" type="primary">点击上传</el-button>
</el-upload>
    </el-tab-pane>
    <el-tab-pane label="商品内容" name="4">
        <!-- 富文本编辑器组件 -->
        <quill-editor v-model="addForm.goods_introduce">

        </quill-editor>
        <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
    </el-tab-pane>
    </el-tabs>
  </el-form>
    </el-card>
    <!-- 图片预览对话框 -->
    <el-dialog
  title="图片预览"
  :visible.sync="previewVisible"
  width="50%">
 <img :src="previewPath" alt="" class="previewImg">
</el-dialog>
    </div>
</template>

<script>
export default {
    data(){
        return{
            activeIndex:'0',
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                // 商品所属分类数组
                goods_cat:[],
                // 图片的数组
                pics:[],
                // 商品详情描述
                goods_introduce:'',
                attrs:[]
            },
            addFormRules:{
                goods_name:[{ required: true, message: '请输入商品名称', trigger: 'blur' }],
                goods_price:[{ required: true, message: '请输入商品价格', trigger: 'blur' }],
                goods_weight:[{ required: true, message: '请输入商品重量', trigger: 'blur' }],
                goods_number:[{ required: true, message: '请输入商品数量', trigger: 'blur' }],
                goods_cat: [{ required: true, message: '请选择商品分类', trigger: 'blur' }]
            },
            catelist:[],
            cateProps:{
            expandTrigger: 'hover',
            value:'cat_id',
            label:'cat_name',
            children:'children'
          },
          manyTableData:[],
          onlyTableData:[],
        //   图片上传组件的header请求头对象
          headerObj:{
            Authorization:window.sessionStorage.getItem('token')
          },
          previewPath:'',
          previewVisible:false
        }
    },
    created(){
        this.getCateList()
    },
    methods:{
        // 获取商品分类数据
        async getCateList(){
          const {data:res} = await this.$http.get('categories')
          if(res.meta.status!==200) return this.$message.error('获取商品分类失败')
          console.log('catelist',res.data);
          this.catelist=res.data
        },
        // 级联选择器变会触发这个函数
        handleChange(){
         
        },
        beforeTableLeave(activeName,oldActiveName){
            if(oldActiveName==='0'&&this.addForm.goods_cat.length!==3){
                this.$message.error('请先选择商品分类')
                return false
            }
        },
       async tabClicked(){ 
            // 证明访问的是动态参数面板
            if(this.activeIndex==='1'){
            const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{
                    params:{sel:'many'}})
            if(res.meta.status!==200)
            return this.$message.error('获取动态参数列表失败')
            res.data.forEach((item)=>{
                item.attr_vals= item.attr_vals.length===0? []:item.attr_vals.split(' ')
            })
            this.manyTableData=res.data
            }else if(this.activeIndex==='2'){
            const {data:res}=await this.$http.get(`categories/${this.cateId}/attributes`,{
                    params:{sel:'only'}})
            if(res.meta.status!==200)
            return this.$message.error('获取静态属性失败')
            this.onlyTableData=res.data
            }
            
        },
        // 处理图片预览效果
        handlePreview(file){
            this.previewPath=file.response.data.url
            this.previewVisible=true
        },
        // 处理移除图片的操作
        handleRemove(file){
            // 1.获取将要删除的图片临时路径
            const filePath=file.response.data.tmp_path
            // 2.从pics数组中，找到这个图片对应的索引值
           const i= this.addForm.pics.findIndex((x)=>x.pic===filePath)
            // 3.调用数组中的splice方法，把图片信息对象从pic数组中移除
            this.addForm.pics.splice(i,1)
        },
        // 监听图片上传成功的事件
        handleSuccess(response){
            console.log('response',response);
            // 1.拼接得到一个图片信息对象
            const picInfo={pic:response.data.tmp_path}
            // 2.将图片信息对象，push到pics数组中
            this.addForm.pics.push(picInfo)
            console.log('addPic',this.addForm.pic);
        },
        add(){
            this.$refs.addFormRef.validate(async valid=>{
                if(!valid){
                    return this.$message.error('请填写必要的表单项目')
                }
                // 处理动态参数
                this.manyTableData.forEach(item=>{
                    const newInfo={attr_id:item.attr_id,
                    attr_value:item.attr_vals.join(' ')}
                    this.addForm.attrs.push(newInfo)
                })
                // 处理静态属性
                this.onlyTableData.forEach(item=>{
                    const newInfo={attr_id:item.attr_id,
                    attr_value:item.attr_vals}
                    this.addForm.attrs.push(newInfo)
                })
                const deepAddForm=JSON.parse(JSON.stringify(this.addForm))
                // 执行添加的业务逻辑
                deepAddForm.goods_cat=deepAddForm.goods_cat.join(',')
                console.log('deepForm',deepAddForm);
                // 发起请求添加商品
                // 商品名称必须唯一
               const {data:res}=await this.$http.post('goods',deepAddForm)
               console.log('res',res);
               if(res.meta.status!==201) return this.$message.error('添加商品失败')
               this.$message.success("添加商品成功")
               this.$router.push('/goods')
            })
        }
    },
    computed:{
        cateId(){
            if(this.addForm.goods_cat.length===3){
                return this.addForm.goods_cat[2]
            }
            return null
        }
    }
}
</script>

<style lang="less" scoped>
.el-steps{
    margin: 15px 0;
}
.el-step__title{
    font-size: 13px;
}
.el-checkbox{
    margin:0 10px 0 0 !important
}
.previewImg{
    width: 100%;
}
.btnAdd{
    margin-top: 15px;
}
</style>